Chemistry, 16.10.2020 16:01, dewillis9380

Copper has two isotopes. Copper-63, which has an atomic mass of of 62.93 u and copper-65, which has an atomic mass of 64.93 u. In any sample of copper atoms, 69.1% will be copper-63 and 30.9% will be copper-65. Calculate the average atomic mass of naturally occurring copper. {Can someone pleases help me.}

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Copper has two isotopes. Copper-63, which has an atomic mass of of 62.93 u and copper-65, which has...